This intervention represents an added treatment to the existing standard of care. All patients will continue to receive standard treatment, which is determined by the attending physician who maintains clinical responsibility for all patients. It consists of patient resuscitation, gastric decontamination (with sodium bicarbonate, and activated charcoal [1 g/Kg, orally] in the first 6 hours after onset of poisoning), adequate hydration and supportive treatment. All the patients will be followed up until discharge or death. All patients will be subjected to: